Choosing the right image format

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Presentation transcript:

Choosing the right image format

What will be briefing looking at: - Introduction - Strengths & Weaknesses and comparison between file formats: The GIF Format The JFIF/JPG/JPEG Format The TIFF Format The PNG Format

Image File Formats: Pro and Cons

Image File Formats: Pro and Cons GIF: PROS: suitable for logos, flat areas of color with well defined regions suitable for icons with few colors support for transparency suitable for small animations CONS Cannot do alpha transparency Outline of solid colour if on gradient background

Gif Vs JPEG Compression Image File Formats: Gif Vs JPEG Compression

Image File Formats: Pro and Cons JPG/JPEG: PROS: suitable for images, high details & quality pictures uses lossy compression it is the most used graphic file format used in design and photography industry – it is likely to see nature photos in JPG file format it is good when you are willing to drop quality from a picture for the sake of file size CONS: it does not support transparency it is not suitable for logos and icons because it doesn’t have transparency and it can generate a bigger file size for small resolution images.

Artifacts on JPEG Format Image File Formats: Artifacts on JPEG Format Quality: 100 Size (bytes): 83,261 Compression ratio: 2.6:1 Comment: Extremely minor artifacts Quality: 50 Size (bytes): 15,138 Compression ratio: 15:1 Comment: Initial signs of subimage artifacts Quality: 25 Size (bytes): 9,553 Compression ratio: 23:1 Comment: Stronger artifacts; loss of high frequency information Quality: 1 Size (bytes): 1,523 Compression ratio: 144:1 Comment: Extreme loss of color and detail; the leaves are nearly unrecognizable

Artifacts on JPEG Format Image File Formats: Artifacts on JPEG Format

Image File Formats: Pro and Cons PNG: PROS: 24bit color / 8bit color(256 colors) suitable for flat areas of colors, logos, transparent or semitransparent images suitable for icons it has alpha channel transparency which is more advance than GIF’s transparency proposed as replacement of GIF by World Wide Web Consortium CONS: it is wise to avoid using PNG with big photos and images with details because of the big generated file size in different situations it has bigger file sizes than JPG

Image File Formats: Pro and Cons PNG Vs GIF Vs JPG: Use PNG if you need 100 % Quality and See through effects Use GIFs if the image is blocks of colour or needs animating JPGs are used for photographs or anything with lots of colour

We hope you enjoyed this presentation and that now you know something more about these graphic formats. Thank you for watching it!